Package: linux-2.6 Version: 2.6.26-21 Severity: normal Tags: patch /proc/pid/maps is empty for all processes, only /proc/self/maps works.
The following patch helped me to fix the problem: --- linux-2.6-2.6.26/fs/proc/base.c 2008-07-13 16:51:29.000000000 -0500 +++ linux/fs/proc/base.c 2009-12-26 02:14:58.000000000 -0600 @@ -251,7 +251,8 @@ task_lock(task); if (task->mm != mm) goto out; - if (task->mm != current->mm && __ptrace_may_attach(task) < 0) + if (task->mm != current->mm && ((mm->flags & MMF_IN_EXEC) || + __ptrace_may_attach(task) < 0)) goto out; task_unlock(task); return mm; I'm writing this report from modified kernel, which contains this patch, and I test like 'cat /proc/1/maps' works now. -- Package-specific info: ** Kernel log: boot messages should be attached -- System Information: Debian Release: 5.0.4 APT prefers stable APT policy: (500, 'stable') Architecture: i386 (i686) Kernel: Linux 2.6.26cust1 Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/bash Versions of packages linux-image-2.6.26-2-686 depends on: ii debconf [debconf-2.0] 1.5.24 Debian configuration management sy ii initramfs-tools [linux-initra 0.92o tools for generating an initramfs ii module-init-tools 3.4-1 tools for managing Linux kernel mo Versions of packages linux-image-2.6.26-2-686 recommends: ii libc6-i686 2.7-18lenny2 GNU C Library: Shared libraries [i Versions of packages linux-image-2.6.26-2-686 suggests: ii grub 0.97-47lenny2 GRand Unified Bootloader (Legacy v pn linux-doc-2.6.26 <none> (no description available) Versions of packages linux-image-2.6.26-2-686 is related to: pn firmware-bnx2 <none> (no description available) pn firmware-bnx2x <none> (no description available) pn firmware-ipw2x00 <none> (no description available) pn firmware-ivtv <none> (no description available) pn firmware-iwlwifi <none> (no description available) pn firmware-linux <none> (no description available) pn firmware-linux-nonfree <none> (no description available) pn firmware-qlogic <none> (no description available) pn firmware-ralink <none> (no description available) -- debconf information: linux-image-2.6.26-2-686/postinst/bootloader-error-2.6.26-2-686: shared/kernel-image/really-run-bootloader: true linux-image-2.6.26-2-686/postinst/old-dir-initrd-link-2.6.26-2-686: true linux-image-2.6.26-2-686/preinst/initrd-2.6.26-2-686: linux-image-2.6.26-2-686/preinst/overwriting-modules-2.6.26-2-686: true linux-image-2.6.26-2-686/postinst/bootloader-test-error-2.6.26-2-686: linux-image-2.6.26-2-686/preinst/lilo-has-ramdisk: linux-image-2.6.26-2-686/postinst/depmod-error-2.6.26-2-686: false linux-image-2.6.26-2-686/prerm/would-invalidate-boot-loader-2.6.26-2-686: true linux-image-2.6.26-2-686/postinst/kimage-is-a-directory: linux-image-2.6.26-2-686/postinst/old-initrd-link-2.6.26-2-686: true linux-image-2.6.26-2-686/preinst/bootloader-initrd-2.6.26-2-686: true linux-image-2.6.26-2-686/preinst/abort-overwrite-2.6.26-2-686: linux-image-2.6.26-2-686/preinst/abort-install-2.6.26-2-686: linux-image-2.6.26-2-686/preinst/elilo-initrd-2.6.26-2-686: true linux-image-2.6.26-2-686/postinst/depmod-error-initrd-2.6.26-2-686: false linux-image-2.6.26-2-686/postinst/create-kimage-link-2.6.26-2-686: true linux-image-2.6.26-2-686/preinst/lilo-initrd-2.6.26-2-686: true linux-image-2.6.26-2-686/prerm/removing-running-kernel-2.6.26-2-686: true linux-image-2.6.26-2-686/preinst/failed-to-move-modules-2.6.26-2-686: linux-image-2.6.26-2-686/postinst/old-system-map-link-2.6.26-2-686: true -- To UNSUBSCRIBE, email to debian-kernel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org